The HANNA® HI 93530 is waterproof theromocouple thermometer that uses a powerful microprocessor to linearize the response of the thermocouple in order to achieve high accuracy and resolution. This thermocouple thermometer can read with a resolution of 0.1 in the -149.9 to 999.9°C and -24.9 to 999.9°F ranges. It is equipped with a HOLD function that freezes the current reading on the LCD. A °C/°F button will change between the Celsius and Fahrenheit ranges; an important feature where measurements are necessary in degrees Celsius as well as Fahrenheit. A wide range of thermocouple probes are available for applications such as liquid, air and semisolids. Hanna #: HI 93530. Range: -200.0 to 999.9°C; 1000 to 1371°C; -328.0 to 999.9°F; 1000 to 2500°F Resolution: 0.1°C (-149.9 to 999.9°C); 0.2°C (-200.0 to -150.0°C); 1°C (outside); 0.1°F (-24.9 to 999.9°F); 0.2°F (-249.9 to -25.0°F); 0.3°F (-328.0 to 250.0°F); 1°F (outside) Accuracy: ±0.5°C (-100.0 to 999.9°C); ±1°C (outside); ±1°F (-148.0 to 999.9°F); ±1.5° (outside); (for 1 year, excluding probe error) Probe: K-thermocouple type, HI 766 series (not included) Battery Type / Life: 3 x 1.5V AA / approx. 500 hours of continuous use (with backlight off); Auto-Off after 60 minutes of non-use (can be disabled).Environment: -10 to 50°C (14 to 122°F); RH max 100% Dimensions: 150 x 80 x 36 mm (5.9 x 3.1 x 1.4") Weight: 235 g (8.3 oz.) HI 93530 is supplied with batteries, protective case and instructions.